Shortly after the voyage of Columbus it was thought that the longitude of a place could be found from its magnetic declination.
A time-shot was successful, and observations were also taken for magnetic declination.
This magnetic declination sorely perplexed Gilbert, as it did not fit in with his theory.
Such deviation is technically known as magnetic declination.
The purpose of the Carnegie is to provide accurate charts of magnetic declination for the use of navigators in general.
In 1851 Lament, a Scotchman at Munich, found a decennial period in the daily range of magnetic declination.
In most cases there is a marked similarity between the curve of magnetic declination and that of the north-south earth current.
|magnetic declination |
The horizontal angle between the true geographic North Pole and the magnetic north pole, as figured from a specific point on the Earth. Compare magnetic inclination.